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Belgrade authorities have used sound weapons on the crowd of protesters. The video description has some educational links.

There are lots of videos around.

  • Sylvartas@lemmy.dbzer0.comEnglish
    6·
    4 hours ago

    Sound is moving air and carries energy. With the right frequency and intensity it could definitely physically fuck you up even if your ears are covered.

    Wikipedia:

    Studies have found that exposure to high intensity ultrasound at frequencies from 700 kHz to 3.6 MHz can cause lung and intestinal damage in mice